“…Galileo observed several intermittent, short‐duration (i.e., ≈ 26 s) events of increased magnetic field magnitude (i.e., ≈ 1%) and with no ion cyclotron waves near Io, which have been interpreted as narrow channels of fast (i.e., ≈ 100 km s) inward motion of tenuous plasma (i.e., ≈ 100 cm −3 ) [ Thorne et al , ; Kivelson et al , ]. For Saturn, about 70–750 kg s −1 of water vapor is ejected from Enceladus' geysers and about 12–250 kg s −1 of that is ionized and transported radially outward [ Bagenal and Delamere , ; Delamere et al , ]. So‐called “injection” events have often been observed by Cassini in Saturn's inner magnetosphere, characterized by a short interaction with a hot tenuous plasma embedded within an ambient cold and dense plasma [ Krimigis et al , ; Mauk et al , ; Thomsen , , and references therein].…”